Intermediate material heating device for benzoyl chloride production

Abstract

The utility model discloses an intermediate material heating device for benzoyl chloride production, which comprises a water bath, and a first valve and a second valve are arranged at the side end of the water bath; the heating tank is communicated with the water bath, and a third valve is arranged between the heating tank and the water bath; the input end of the hot water circulating pump is communicated with the water bath, a fourth valve is arranged between the hot water circulating pump and the water bath, the output end of the hot water circulating pump is communicated with the heating tank, and a fifth valve is arranged between the hot water circulating pump and the heating tank. Through actual production test comparison, after water bath heating, the purity of the benzoyl chloride intermediate can be remarkably improved, for example, when steam heating is adopted originally, the product melting rate is stabilized at 80%, 20% is forced to be lost due to the reaction of hot water and materials, and the loss can be completely eradicated by melting materials at the same temperature after water bath heating.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and in particular to a heating device for intermediate materials in the production of benzoyl chloride. Background Technology

[0002] Traditional steam heating methods have limitations. In the melting process of benzoyl chloride intermediates, steam heating often has several shortcomings. For example, the temperature control precision of steam heating is sometimes unsatisfactory; fluctuations in steam pressure can lead to significant temperature variations. Furthermore, direct steam melting can cause a reaction between the steam and the material, generating large amounts of wastewater and resulting in material loss. Additionally, steam-heated storage containers are prone to breakage, leading to material contact with water and reactions during melting. Issues such as temporary pipeline leaks and steam condensate discharge also require handling. Water bath heating, on the other hand, offers uniform temperature and relatively easy, precise control. By adjusting the water temperature (using a temperature transmitter and a control valve), a relatively stable thermal environment can be provided for melting the benzoyl chloride intermediates. Moreover, water bath heating devices are relatively simple and compact, lower in cost, easier to operate, and offer safety advantages, as they do not require human contact.

[0003] A Chinese patent discloses a "steam heating and hot water production device" (application number CN201721797494.6). Two rows of steam pipe supports are vertically and evenly arranged on both sides of the inner wall of a hot water storage tank. Two steam pipes pass through the top of the tank from both sides and extend into the tank. The two steam pipes are fixed to the steam pipe supports on both sides and are externally connected to a main steam pipe. A vent is provided at the top of the tank. Industrial water pipes and hot water pipes are installed on the upper and lower sides of the tank, respectively. A hot water pump is installed on the hot water pipe. Due to its reasonable design, the heating time is greatly shortened, thereby shortening the production cycle. However, the device has low temperature control precision, a large temperature variation range, and generates a large amount of wastewater, resulting in material loss. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a heating device for intermediate materials in the production of benzoyl chloride. Through actual production testing and comparison, the purity of benzoyl chloride intermediates can be significantly improved after using water bath heating. For example, when steam heating was used, the product melting rate was stable at 80%, with 20% being lost due to the reaction between hot water and the material. With water bath heating, melting at the same temperature completely eliminates this loss. Due to precise temperature control, the reaction can reach the optimal reaction rate more quickly and proceed stably, shortening the entire production cycle. Previously, melting one batch of benzoyl chloride intermediates required 8 hours; after optimization, this can be reduced to about 6 hours, improving equipment utilization and overall capacity, and increasing efficiency. From the perspective of equipment construction and maintenance, the cost of the water bath heating system is much lower than that of the steam heating system, and the subsequent maintenance labor and material costs are also significantly reduced. Furthermore, there are no safety hazards related to steam, such as high pressure and leakage, making the production environment safer and more reliable, meeting the safety requirements of chemical production, saving costs, and enhancing safety.

[0005] This utility model also provides a heating device for intermediate materials in the production of benzoyl chloride, comprising: a water bath, wherein a first valve and a second valve are provided on the side end of the water bath; a heating tank, wherein the heating tank is connected to the water bath, and a third valve is provided between the heating tank and the water bath; a hot water circulation pump, wherein the input end of the hot water circulation pump is connected to the water bath, and a fourth valve is provided between the hot water circulation pump and the water bath; the output end of the hot water circulation pump is connected to the heating tank, and a fifth valve is provided between the hot water circulation pump and the heating tank.

[0006] According to the present invention, a heating device for intermediate materials in the production of benzoyl chloride is provided with an insulating cover plate at the upper end of the water bath, and the insulating cover plate is threadedly connected to the water bath. This facilitates the sealing and insulation of the water bath.

[0007] According to the present invention, a heating device for intermediate materials in the production of benzoyl chloride includes a temperature control instrument fixedly connected to the side of the heating tank, which is connected to the heating tank for convenient temperature feedback and adjustment.

[0008] According to the present invention, a heating device for intermediate materials in the production of benzoyl chloride includes a temperature regulating valve at the upper end of the heating tank, which is connected to a temperature control instrument. This facilitates temperature feedback and adjustment.

[0009] Beneficial effects:

[0010] 1. Compared with the existing technology, the intermediate material heating device for benzoyl chloride production, after actual production test and comparison, shows that the purity of benzoyl chloride intermediate can be significantly improved after water bath heating. For example, when steam heating was originally used, the product melting rate was stable at 80%, and 20% was lost due to the reaction between hot water and material. After switching to water bath heating, the material is melted at the same temperature, which can completely eliminate this loss.

[0011] 2. Compared with the existing technology, the intermediate material heating device for benzoyl chloride production can achieve the optimal reaction rate and proceed stably faster due to precise temperature control, which shortens the entire production cycle. Originally, it took 8 hours to produce benzoyl chloride intermediates from a batch of melted material, but after optimization, it can be shortened to about 6 hours, which improves the utilization rate of equipment and overall capacity, and enhances efficiency.

[0012] 3. Compared with existing technologies, the intermediate material heating device for benzoyl chloride production has a much lower cost for water bath heating system than steam heating system in terms of equipment construction and maintenance. The subsequent maintenance manpower and material costs are also significantly reduced. Furthermore, there are no safety hazards such as high pressure and leakage associated with steam. The production environment is safer and more reliable, meets the safety requirements of chemical production, saves costs, and enhances safety. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a schematic diagram of the system connection structure of an intermediate material heating device for benzoyl chloride production according to this utility model;

[0015] Legend:

[0016] 1. Water bath; 2. Hot water circulation pump; 3. Heating tank; 4. Insulation cover; 5. Temperature control instrument; 6. Temperature regulating valve; 7. First valve; 8. Second valve; 9. Third valve; 10. Fourth valve; 11. Fifth valve. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1This utility model embodiment provides a heating device for intermediate materials in the production of benzoyl chloride, which includes a water bath 1, a first valve 7 and a second valve 8 provided on the side of the water bath 1, and a heat insulation cover 4 provided on the upper end of the water bath 1, which is threadedly connected to the water bath 1.

[0019] Heating tank 3 is connected to water bath 1. A third valve 9 is provided between heating tank 3 and water bath 1. A temperature control instrument 5 is fixedly connected to the side end of heating tank 3. The temperature control instrument 5 is connected to heating tank 3. A temperature regulating valve 6 is provided at the upper end of heating tank 3. The temperature regulating valve 6 is connected to temperature control instrument 5.

[0020] Hot water circulation pump 2, the input end of hot water circulation pump 2 is connected to water bath tank 1, a fourth valve 10 is provided between hot water circulation pump 2 and water bath tank 1, the output end of hot water circulation pump 2 is connected to heating tank 3, and a fifth valve 11 is provided between hot water circulation pump 2 and heating tank 3;

[0021] Specifically, add an appropriate amount of tap water to the water bath 1, place the melting tank into the water bath 1, open the third valve 9, the fourth valve 10 and the fifth valve 11, turn on the hot water circulation pump 2, adjust the temperature to 50℃ for automatic control, and run the system temperature stably. Observe the material condition of the melting tank in the water bath 1 to determine the most suitable time.

[0022] Working principle: Hot water circulating pump 2 transports the hot water from the water bath 1, after heat exchange with the packaging barrels being heated, to the heating tank 3 for heating. Temperature control instrument 5 controls the temperature regulating valve 6 in cascade to control the steam flow rate, maintaining the heating temperature between 50-80℃. Direct heat exchange between steam and hot water reduces steam condensate loss. The system is replenished with tap water. Hot water in the heating tank 3 overflows into the water bath 1 through the third valve 9. This system requires complete insulation to prevent heat loss. The second valve 8 must be normally open, and its height is 1150mm from the bottom, slightly lower than the 1200mm height of the packaging barrels, to prevent hot water from entering and contaminating the materials. The water bath 1 should be selected or customized with sufficient capacity and corrosion resistance, depending on the type of material barrels storing the intermediates; for example, stainless steel can be used. The material is treated with a special anti-corrosion coating on the inner wall, and its shape and size must ensure that it can well wrap the reaction part that needs to be heated to ensure uniform heat transfer. A suitable low-pressure steam is selected as the heating source, and the steam volume is automatically controlled according to the temperature. The control is determined based on the heating rate requirements and the overall heat balance. It is equipped with a high-precision temperature sensor to feed the temperature signal back to the intelligent temperature controller, so that the water temperature can be accurately set and adjusted to ensure that the temperature of the reaction system is stable within the optimal temperature range required for the benzoyl chloride intermediate melt. For the material tank placed in the water bath, it is necessary to ensure good heat conduction between it and the water bath tank 1. A small hot water circulation pump 2 is set in the water bath container to allow the hot water to circulate, further ensuring the uniformity of the temperature of the entire water bath environment and improving the heat transfer efficiency.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heating device for intermediate materials in the production of benzoyl chloride, characterized in that, include: A water bath (1) is provided with a first valve (7) and a second valve (8) at its side end; Heating tank (3), the heating tank (3) is connected to water bath (1), and a third valve (9) is provided between the heating tank (3) and water bath (1); A hot water circulation pump (2) is provided. The input end of the hot water circulation pump (2) is connected to the water bath tank (1). A fourth valve (10) is provided between the hot water circulation pump (2) and the water bath tank (1). The output end of the hot water circulation pump (2) is connected to the heating tank (3). A fifth valve (11) is provided between the hot water circulation pump (2) and the heating tank (3).

2. The intermediate material heating device for benzoyl chloride production according to claim 1, characterized in that, The upper end of the water bath (1) is provided with a heat insulation cover plate (4), which is threadedly connected to the water bath (1).

3. The intermediate material heating device for benzoyl chloride production according to claim 1, characterized in that, A temperature control instrument (5) is fixedly connected to the side end of the heating tank (3), and the temperature control instrument (5) is connected to the heating tank (3).

4. The intermediate material heating device for benzoyl chloride production according to claim 1, characterized in that, The upper end of the heating tank (3) is provided with a temperature regulating valve (6), which is connected to the temperature control instrument (5).

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